Polarization-dependent strong coupling between silver nanorods and photochromic molecules

• Gwénaëlle Lamri,
• Alessandro Veltri,
• Jean Aubard,
• Pierre-Michel Adam,
• Nordin Felidj and
• Anne-Laure Baudrion

Beilstein J. Nanotechnol. 2018, 9, 2657–2664, doi:10.3762/bjnano.9.247

• when the black dashed curves cross the white dashed lines. Indeed, in Figure 3b, the anti-crossing appears for a rod width of 95 nm and in Figure 3d, it appears for a rod length of about 85 nm. These values are in agreement with the experimental values, specially knowing that the given geometrical

• parameters of the nanorods, mainly width and length, correspond to the designed values. Indeed, only few images have been recorded by electronic microscopy after the nanofabrication process and small variations between the designed and the real sizes can occur. To confirm the observation of a strong coupling

Metal–dielectric hybrid nanoantennas for efficient frequency conversion at the anapole mode

• Valerio F. Gili,
• Lavinia Ghirardini,
• Davide Rocco,
• Giuseppe Marino,
• Ivan Favero,
• Iännis Roland,
• Giovanni Pellegrini,
• Lamberto Duò,
• Marco Finazzi,
• Luca Carletti,
• Andrea Locatelli,
• Aristide Lemaître,
• Dragomir Neshev,
• Costantino De Angelis,
• Giuseppe Leo and
• Michele Celebrano

Beilstein J. Nanotechnol. 2018, 9, 2306–2314, doi:10.3762/bjnano.9.215

• and Discussion Our plasmonic-dielectric hybrid nanostructures consist of AlGaAs nanodisks surrounded by an Au ring (Figure 1). Individual nanodisks (Figure 1b) and Au rings with the same geometrical parameters are also fabricated as a reference. We consider two distinct geometries: type 1 features a

• nanopillar with nominal radius r1 = 410 nm, height h = 200 nm and gap size g1 ≈ 100 nm as shown in Figure 1c, while type 2 features a nanopillar radius r2 = 380 nm with the same height and a gap size g2 = 200 nm (not shown). The geometrical parameters of the Au ring in both cases are w = 410 nm and h = 80 nm

• pump wavelength. By engineering the geometrical parameters of dielectric nanoresonators working at the anapole mode, Wang and Dal Negro [21] demonstrated that light absorption can be enhanced. While this approach proved effective to finely tune the anapole condition, the pump light absorption and

Optimization of the optical coupling in nanowire-based integrated photonic platforms by FDTD simulation

• Nan Guan,
• Andrey Babichev,
• Martin Foldyna,
• Dmitry Denisov,
• François H. Julien and
• Maria Tchernycheva

Beilstein J. Nanotechnol. 2018, 9, 2248–2254, doi:10.3762/bjnano.9.209

• emitting diode (LED) and a nanowire photodetector connected with a waveguide is proposed. The light coupling efficiency from the LED to the detector is optimized as a function of the geometrical parameters of the system using the finite difference time domain simulation tool Lumerical. Starting from a

• efficiency was optimized by varying the geometrical parameters of the platform. Considering the computational capacity, 2D simulations at the vertical cross-sectional plane in the middle of the waveguide were used to evaluate the impact of the SiO2 spacer thickness and to study the influence of the spin-on

• the NW was 600 nm. The thickness of the spin-on encapsulating layer was 500 nm, and the SiNx waveguide thickness was 500 nm with the width of 10 µm. For these geometrical parameters, separate COMSOL simulations show that the SiNx waveguide sustains a large number of modes (in particular, many modes

Electrospun one-dimensional nanostructures: a new horizon for gas sensing materials

• Muhammad Imran,
• Nunzio Motta and
• Mahnaz Shafiei

Beilstein J. Nanotechnol. 2018, 9, 2128–2170, doi:10.3762/bjnano.9.202

Perfusion double-channel micropipette probes for oxygen flux mapping with single-cell resolution

• Yang Gao,
• Bin Li,
• Riju Singhal,
• Adam Fontecchio,
• Ben Pelleg,
• Zulfiya Orynbayeva,
• Yury Gogotsi and
• Gary Friedman

Beilstein J. Nanotechnol. 2018, 9, 850–860, doi:10.3762/bjnano.9.79

• ) starts to evolve and tilt more towards the extraction channel. Therefore, the average dye concentration in the extraction channel also increases as the injection pressure is increased. Figure 2b shows the results of the FEM where the pipette diameter at the tip and other geometrical parameters of the

• injection pressure, while the extraction flow rate is held constant (5 µL/min). The left channel is the extraction channel, and the right channel is the pressurized injection channel, Pin = Papplied_total_pressure − 1 atm, 1 hPa = 100 Pa. b) Simulated perfusion flow patterns. The geometrical parameters to

High-contrast and reversible scattering switching via hybrid metal-dielectric metasurfaces

• Jonathan Ward,
• Khosro Zangeneh Kamali,
• Lei Xu,
• Guoquan Zhang,
• Andrey E. Miroshnichenko and
• Mohsen Rahmani

Beilstein J. Nanotechnol. 2018, 9, 460–467, doi:10.3762/bjnano.9.44

• metasurface. The geometrical parameters are Lx = 100 nm, Ly = 600 nm, Lz = 200 nm, t = 200 nm, d = 400 nm, h = 400 nm, g = 60 nm, p1 = 850 nm, p2 = 850 nm. (a) Bandgap energy (blue curve) and variation of refractive index (dark curve) versus temperature change for bulk silicon [40]. (b) Transmission of

Dynamic behavior of nematic liquid crystal mixtures with quantum dots in electric fields

• Emil Petrescu,
• Cristina Cirtoaje and
• Octavian Danila

Beilstein J. Nanotechnol. 2018, 9, 399–406, doi:10.3762/bjnano.9.39

• equations. Thus, it may be neglected and fp0 = 11.52wb2π . Considering the volumetric concentration of quantum dots, we obtain: where f0 = (11.52/2)wπR2 is a constant depending on the geometrical parameters of the system and the LC + QD interaction energy calculated for the ellipsoid QD presented in Figure

Refractive index sensing and surface-enhanced Raman spectroscopy using silver–gold layered bimetallic plasmonic crystals

• Somi Kang,
• Sean E. Lehman,
• Matthew V. Schulmerich,
• An-Phong Le,
• Tae-woo Lee,
• Stephen K. Gray,
• Rohit Bhargava and
• Ralph G. Nuzzo

Beilstein J. Nanotechnol. 2017, 8, 2492–2503, doi:10.3762/bjnano.8.249

• observed here in this work. Conclusion The influence of the mass coverage of Ag and Au thin films as well as the geometrical parameters of the nanohole arrays of bimetallic (bilayer) plasmonic crystals were characterized through multispectral bulk RI sensing and SERS measurements combined with insights

Involvement of two uptake mechanisms of gold and iron oxide nanoparticles in a co-exposure scenario using mouse macrophages

• Dimitri Vanhecke,
• Dagmar A. Kuhn,
• Dorleta Jimenez de Aberasturi,
• Sandor Balog,
• Ana Milosevic,
• Dominic Urban,
• Diana Peckys,
• Niels de Jonge,
• Wolfgang J. Parak,
• Alke Petri-Fink and
• Barbara Rothen-Rutishauser

Beilstein J. Nanotechnol. 2017, 8, 2396–2409, doi:10.3762/bjnano.8.239

• characterization. Given that the particles were polydisperse and were functionalized with a polymer, the dose delivered near the cell was estimated by approaches reported elsewhere, taking into account the geometrical parameters of the cell culture wells, such as overall fluid volume and well diameter [28][29

Numerical investigation of the tribological performance of micro-dimple textured surfaces under hydrodynamic lubrication

• Kangmei Li,
• Dalei Jing,
• Jun Hu,
• Xiaohong Ding and
• Zhenqiang Yao

Beilstein J. Nanotechnol. 2017, 8, 2324–2338, doi:10.3762/bjnano.8.232

• -dimple unit. As shown in Figure 2, due to the symmetrical characteristic of each micro-dimple unit, only half of the fluid in the micro-dimple unit is chosen as the computational domain. The coordinate system and geometrical parameters of the computational domain used in this study are also shown in

Ta₂N₃ nanocrystals grown in Al₂O₃ thin layers

• Krešimir Salamon,
• Maja Buljan,
• Iva Šarić,
• Mladen Petravić and
• Sigrid Bernstorff

Beilstein J. Nanotechnol. 2017, 8, 2162–2170, doi:10.3762/bjnano.8.215

• the geometrical parameters, on the structure configuration and on the surrounding media of the nanostructures. By using the ML deposition procedure and annealing, we have demonstrated in this work a potential strategy to accomplish highly tunable and designable optical properties of thin films

Ester formation at the liquid–solid interface

• Nguyen T. N. Ha,
• Thiruvancheril G. Gopakumar,
• Nguyen D. C. Yen,
• Carola Mende,
• Lars Smykalla,
• Maik Schlesinger,
• Roy Buschbeck,
• Tobias Rüffer,
• Heinrich Lang,
• Michael Mehring and
• Michael Hietschold

Beilstein J. Nanotechnol. 2017, 8, 2139–2150, doi:10.3762/bjnano.8.213

• of LP increases slightly as the time of sonication increases, whereas the other geometrical parameters (e.g., B, θ) remain nearly unchanged. As a result, the packing density of LP decreases slightly with increasing sonication time. It is to be noted that the distances between TMA dimers in the dimer

• the angle between the molecular unit cell axis A and the pair formed by TMA groups of adjacent monoesters. These quantities are indicated in Table 1. The geometrical parameters of the synthesized monoester pattern obtained here are in excellent agreement with those observed for ester type-II formed

A top-down approach for fabricating three-dimensional closed hollow nanostructures with permeable thin metal walls

• Carlos Angulo Barrios and
• Víctor Canalejas-Tejero

Beilstein J. Nanotechnol. 2017, 8, 1231–1237, doi:10.3762/bjnano.8.124

• refractive index of Al oxide and air were assumed to be frequency independent and equal to 1.76 and 1, respectively. The particular geometrical parameters of the modelled structure were chosen according to the dimensions of the fabricated nanopillars: tc = 320 nm, dc = 270 nm, tn = 250 nm, dn = 2.3 × dc

Properties of Ni and Ni–Fe nanowires electrochemically deposited into a porous alumina template

• Alla I. Vorobjova,
• Dmitry L. Shimanovich,
• Kazimir I. Yanushkevich,
• Sergej L. Prischepa and
• Elena A. Outkina

Beilstein J. Nanotechnol. 2016, 7, 1709–1717, doi:10.3762/bjnano.7.163

• ][10]. Applying of porous alumina as a template allows the formation of vertically ordered NW arrays with uniform geometrical parameters (diameter, length, and density) which can be readily controlled over a wide range of sizes [11][12][13][14]. Additionally, porous alumina is a heat-resistant material

Magnetic switching of nanoscale antidot lattices

• Ulf Wiedwald,
• Joachim Gräfe,
• Kristof M. Lebecki,
• Maxim Skripnik,
• Felix Haering,
• Gisela Schütz,
• Paul Ziemann,
• Eberhard Goering and
• Ulrich Nowak

Beilstein J. Nanotechnol. 2016, 7, 733–750, doi:10.3762/bjnano.7.65

• geometrical parameters in the 100–500 nm regime, a modified variant of colloidal lithography based on previous works [12][20] is applied. The approach exhibits remarkable flexibility as well as the possibility to pattern substrates on a centimetre scale. The preparation process consist of 4 steps: (a) the

Cantilever bending based on humidity-actuated mesoporous silica/silicon bilayers

• Christian Ganser,
• Gerhard Fritz-Popovski,
• Roland Morak,
• Parvin Sharifi,
• Benedetta Marmiroli,
• Barbara Sartori,
• Heinz Amenitsch,
• Thomas Griesser,
• Christian Teichert and
• Oskar Paris

Beilstein J. Nanotechnol. 2016, 7, 637–644, doi:10.3762/bjnano.7.56

• nanostructural parameters of the porous film, following the rigorous thermodynamic treatment of sorption-induced deformation introduced by Gor and Neimark [13]. It is shown that the maximum cantilever deflection at high RH depends on geometrical parameters (cantilever length and thickness of film and substrate

Determination of Young’s modulus of Sb₂S₃ nanowires by in situ resonance and bending methods

• Liga Jasulaneca,
• Raimonds Meija,
• Alexander I. Livshits,
• Juris Prikulis,
• Subhajit Biswas,
• Justin D. Holmes and
• Donats Erts

Beilstein J. Nanotechnol. 2016, 7, 278–283, doi:10.3762/bjnano.7.25

• resonance and static bending. The results show that the investigated NWs have Young’s moduli close to that of bulk Sb2S3, which depend on the size over the examined range of the NW cross-sectional area. The scatter of the obtained values could be attributed to errors in measured geometrical parameters and

Effects of spin–orbit coupling and many-body correlations in STM transport through copper phthalocyanine

• Benjamin Siegert,
• Andrea Donarini and
• Milena Grifoni

Beilstein J. Nanotechnol. 2015, 6, 2452–2462, doi:10.3762/bjnano.6.254

• yields a total of 195 valence electrons for neutral CuPc. Atomic on-site energies εα and geometrical parameters were taken from [7][15]. The hopping matrix elements bαβ in Equation 2 are obtained by using the Slater–Koster [16] and Harrison [17] LCAO schemes, similar to [18]. Numerical diagonalization of

Mapping bound plasmon propagation on a nanoscale stripe waveguide using quantum dots: influence of spacer layer thickness

• Chamanei S. Perera,
• Alison M. Funston,
• Han-Hao Cheng and
• Kristy C. Vernon

Beilstein J. Nanotechnol. 2015, 6, 2046–2051, doi:10.3762/bjnano.6.208

• 2.4 [13]. The thickness of the ITO was 15 nm. Geometrical parameters of the stripe waveguide were theoretically determined to ensure the waveguide was single mode (). This required the thickness of the waveguide to be around 30 nm. The propagation length of this mode within a waveguide of these

Fabrication of high-resolution nanostructures of complex geometry by the single-spot nanolithography method

• Alexander Samardak,
• Margarita Anisimova,
• Aleksei Samardak and
• Alexey Ognev

Beilstein J. Nanotechnol. 2015, 6, 976–986, doi:10.3762/bjnano.6.101

• production of polymer nanopatterns with controllable geometrical parameters by means of a single-spot electron-beam lithography technique. The essence of the method entails the overexposure of a positive-tone resist, spin-coated onto a substrate where nanoscale spots are exposed to an electron beam with a

Electroburning of few-layer graphene flakes, epitaxial graphene, and turbostratic graphene discs in air and under vacuum

• Andrea Candini,
• Nils Richter,
• Domenica Convertino,
• Camilla Coletti,
• Franck Balestro,
• Wolfgang Wernsdorfer,
• Mathias Kläui and
• Marco Affronte

Beilstein J. Nanotechnol. 2015, 6, 711–719, doi:10.3762/bjnano.6.72

• graphene junctions (same layer thickness, roughly the same geometrical parameters). For each flake we processed approximately half of the junctions under ambient conditions (room temperature and in air) and the other half under vacuum (pressure below 10−4 mbar) so that the final comparison between the

Hollow plasmonic antennas for broadband SERS spectroscopy

• Gabriele C. Messina,
• Mario Malerba,
• Pierfrancesco Zilio,
• Ermanno Miele,
• Michele Dipalo,
• Lorenzo Ferrara and
• Francesco De Angelis

Beilstein J. Nanotechnol. 2015, 6, 492–498, doi:10.3762/bjnano.6.50

• is still higher than that derived from conventional broad-range plasmonic enhancers, such as silver nanoparticles [28]. Moreover, it has been verified that a fine tuning of the optical properties of antennas can be achieved by controlling their geometrical parameters such as height and diameter, in

Mechanical properties of sol–gel derived SiO₂ nanotubes

• Boris Polyakov,
• Mikk Antsov,
• Sergei Vlassov,
• Leonid M Dorogin,
• Mikk Vahtrus,
• Roberts Zabels,
• Sven Lange and
• Rünno Lõhmus

Beilstein J. Nanotechnol. 2014, 5, 1808–1814, doi:10.3762/bjnano.5.191

• thick shell NTs on a SiO2 plane were indented with a spherical Si tip. All geometrical parameters of each individual shell studied experimentally were used to build the geometry for each separate FEM simulation. The model used the elastic parameters of the silicon tip: Young’s modulus E1 = 160 GPa and

• therefore the experimental values can be compared to the fully elastic result from FEM simulations. A parametric sweep over the Young modulus of the shell was used to calculate the elastic force acting on the indentation tip and was then compared to the experimental force–displacement curve. Geometrical

• parameters of indenter and each individual shell were determined from HRSEM images (tip radius 25 nm). An example of a FEM simulation of indentation is shown in Figure 5. Additionally, the thin-shell and Hertz models were used for comparison. The thin-shell model allows to neglect the shape of the indenter

Review of nanostructured devices for thermoelectric applications

• Giovanni Pennelli

Beilstein J. Nanotechnol. 2014, 5, 1268–1284, doi:10.3762/bjnano.5.141

• total current I in the generator depends on the thermoelectric parameters (S, σ and kt), on the geometrical parameters (length and cross section surface of the generator legs), and on the load resistance RL. Combining the thermoelectricity Equation 5 and Equation 6 with the stationary heat equation ∂Φ

• electrical resistivity ρ = 1/σ and from the material thermal conductivity kt, to be combined with the geometrical parameters of the legs (length and cross-section surface). Given a temperature difference TH − TC, the generator acts as a voltage generator with an open circuit voltage Vg = Stotal(TH − TC

3D nano-structures for laser nano-manipulation

• Gediminas Seniutinas,
• Lorenzo Rosa,
• Gediminas Gervinskas,
• Etienne Brasselet and
• Saulius Juodkazis

Beilstein J. Nanotechnol. 2013, 4, 534–541, doi:10.3762/bjnano.4.62

• . Figure 2a compares transmission and reflectivity spectra of the hole array structure with cylindrical and conical nano-well patterns. The major spectral features are similar, and by tuning the geometrical parameters of the pattern it is possible to maximize the transmission of specific wavelengths